A plotting device is a tool used to create visual representations of data. It can be used to illustrate relationships between different variables or to show trends over time. The two most common plotting devices are graphs and grids. A GRAPH is a diagram that uses lines, curves, or areas to represent data. A GRID is a two-dimensional array of squares or rectangles that can be used to organize data. Both of these plotting devices are useful for visualizing data and can help to make complex information easier to understand.